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Chrome Custom Tab get content and page event listener

I'm developing an Android app. In past projects, I used to use WebView to show web content. This gave me the capability to intercept events like page loaded and so on. The important thing that I was able to do was to get page content and use it in the Java code. To be honest, I use a trick, but it works. I put the essential code of my fragment to use a WebView to open an URL, do something and when the user arrives in a specific page and get the page content (with MyJavaScriptInterface):
public class LoginFragment extends MyAppFragment {
#BindView(R.id.webView)
public WebView webView;
public LoginFragment() {
}
#Override
public void onResume() {
super.onResume();
webView.setVisibility(View.VISIBLE);
}
#SuppressLint("SetJavaScriptEnabled")
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_login, container, false);
initBinder(rootView);
...
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setDisplayZoomControls(false);
webView.setWebViewClient(mWebViewClient);
/* Register a new JavaScript interface called HTMLOUT */
webView.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT");
webView.loadUrl(getResources().getString(R.string.url_login).trim());
return rootView;
}
/* An instance of this class will be registered as a JavaScript interface */
class MyJavaScriptInterface {
#JavascriptInterface
#SuppressWarnings("unused")
public void processHTML(String token) {
if (token.contains(URL_LANDING)) {
...
}
}
}
private WebViewClient mWebViewClient = new WebViewClient() {
#Nullable
#Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
Logger.info("shouldInterceptRequest " + request.getUrl().toString());
if (URL_LANDING_SESAPP.equals(request.getUrl().toString())) {
...
}
return super.shouldInterceptRequest(view, request);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
...
return super.shouldOverrideUrlLoading(view, request);
}
#Override
public void onLoadResource(WebView view, String url) {
...
super.onLoadResource(view, url);
}
#Override
public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {
super.onReceivedHttpError(view, request, errorResponse);
}
#Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
...
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
...
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
pageLoading = false;
if (loginDone) {
view.loadUrl("javascript:window.HTMLOUT.processHTML(document.getElementsByTagName('body')[0].innerHTML);")
}
}
};
}
Is there an equivalent way to do this with Chrome Custom Tags? Thank you in advance.

Why web view refresh in android after camera close?

I am opening a URL in webview .there is input field initial value is blank .and a button in my application.on button click I am opening my camera and capture image and back to my web view to show the image.
Issue is
Initially, the input field is blank .now I type “abc” in the input field when I click the button to capture an image.The image is shown but web view is reloaded and my input field become blank again why ?? It should persist in his state.
package com.example.myapp.myapplication;
import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.util.Log;
import android.webkit.JavascriptInterface;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.widget.Toast;
import java.io.ByteArrayOutputStream;
public class MainActivity extends AppCompatActivity {
private static final int CAMERA_REQUEST = 1888;
private static final int MY_CAMERA_PERMISSION_CODE = 100;
WebView webView;
public static Bitmap photo;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webview);
webView.loadUrl("http://100.50.100.97:32671");
// webView.loadUrl("http://115.10.74.180:30019");
JavaScriptInterface jsInterface = new JavaScriptInterface(this);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient());
webView.addJavascriptInterface(jsInterface, "JSInterface");
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == MY_CAMERA_PERMISSION_CODE) {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "camera permission granted", Toast.LENGTH_LONG).show();
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
} else {
Toast.makeText(this, "camera permission denied", Toast.LENGTH_LONG).show();
}
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
photo = (Bitmap) data.getExtras().get("data");
// Log.d("My map",photo,"");
if (webView != null) {
// webView.loadUrl("http://100.50.100.97:32671");
webView.loadUrl("http://115.10.74.180:30019");
}
}
}
public void checkTest(){
if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.CAMERA}, MY_CAMERA_PERMISSION_CODE);
} else {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
}
}
class JavaScriptInterface {
private MainActivity activity;
public JavaScriptInterface(MainActivity activity) {
this.activity = activity;
}
#JavascriptInterface
public void test() {
this.activity.checkTest();
}
#JavascriptInterface
public String bitMapToBase64()
{
if (MainActivity.photo != null) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
//add support for jpg and more.
MainActivity.photo.compress(Bitmap.CompressFormat.PNG, 50, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();
String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
return encoded;
}
return "null image";
}
}
the issue is on this line
if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
photo = (Bitmap) data.getExtras().get("data");
// Log.d("My map",photo,"");
if (webView != null) {
// webView.loadUrl("http://100.50.100.97:32671");
webView.loadUrl("http://115.10.74.180:30019");
}
}
}
why whole content is refreshed?

How to load a custom error page in webview when no internet connection?

Im trying to find out how I add a custom offline page to my webview app. The app works well I just feel like a custom offline page would look much better! I have looked at some answers online but they dont seem to work any more :(. I hope someone can help!
Here is my Main code is (Made in the android studio):
package com.rizwan.yvsse;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import com.onesignal.OneSignal;
public class MainActivity extends AppCompatActivity {
WebView webView;
ProgressBar progressBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OneSignal.startInit(this)
.inFocusDisplaying(OneSignal.OSInFocusDisplayOption.Notification)
.unsubscribeWhenNotificationsAreDisabled(true)
.init();
Intent intent = new Intent(MainActivity.this, splash_screen.class);
startActivity(intent);
progressBar= (ProgressBar)findViewById(R.id.progressBar);
webView = (WebView) findViewById(R.id.webview);
String url="https://yvsse.com/billing/";
webView.loadUrl(url);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webView.setWebViewClient(new HelloWebViewClient());
}
#Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
MainActivity.this);
// set title
alertDialogBuilder.setTitle("Exit");
// set dialog message
alertDialogBuilder
.setMessage("Do you really want to exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, close
// current activity
MainActivity.this.finish();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
}
private class HelloWebViewClient extends WebViewClient {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView webView, String url) {
webView.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
progressBar.setVisibility(view.GONE);
// TODO Auto-generated method stub
super.onPageFinished(view, url);
}
}
}
Thank you!

Overrride the onReceivedError method and check internet connectivity inside it to confirm that the url failed because of the internet connectivity
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
if(!isappOnline()) {
webView.loadUrl("file:///android_asset/error.html");
}
}
private boolean isappOnline() {
ConnectivityManager cm = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
return cm.getActiveNetworkInfo() != null;
}
also add your fallback page in assets folder src/main/assets/

Using Fused Location Provider for Wikitude

I previously used Android Location Manager to retrieve location. However, when I run wikitude apps, the POIs are loaded but are not displayed. I read a few posts saying that this may caused by basic Location Strategy. Therefore, I decided to use Fused Location Provider. The problem still occur. Please help me anyone
package xyz.arlayer.scratch;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.app.Activity;
import android.location.Location;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.wikitude.architect.ArchitectStartupConfiguration;
import com.wikitude.architect.ArchitectView;
import java.io.IOException;
public class Augmented extends Activity implements
LocationListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final int WIKITUDE_PERMISSIONS_REQUEST_CAMERA = 2;
private ArchitectView architectView;
private static final String TAG = "LocationActivity";
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mCurrentLocation;
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_augmented);
this.architectView = this.findViewById(R.id.architectView);
final ArchitectStartupConfiguration config = new ArchitectStartupConfiguration();
config.setLicenseKey("AOfmybWCEL410fS81fIe29RwjF2eLJ00DCjmqSl+xZaUQc6E48KtXM9oxnbRayoGTjCzG2hSfq7oxzLDO0K8fVZfNyUs1DnLzm+p4jPSHEotpKJOrMmH8aOJoGLsiFfTcXzJY58Kj/EJt0dOHZvBXz/KBka4EPhvcvoDVq//6FFTYWx0ZWRfX9YCljHdYuEA0smGRDePFWZ3TTxz6sxXRJNfTU2P4aKDSsN1hXCicvw/Yf0cs8/v7xjI7UgOk+HZ+qkU2oDidWOPvPji7cbOhZ6pq3vA35s5aNJQU5t1o2LpaLuJyANaRgS/nGpmTYi/fRB6clGZcwEUgvyEl+OcNFL/7BFJUSJQTBdD6UBXy8Dfioh4mlupKMkIHn1d6nSYgTmu1tMn2MFVKTIL9O1qzopPe9O+J945Pq5NCvXbzaIL+6mn7BO6r+KxEY3XNKnpnmER0lnNxEobpY65Byy1v+oWFSCAi65mzEvGSzhGMMaqzlWHx7vJeaPRSoxqUcokvi8iLfiowRRptkiE+VQmNyb03gEViQd2LaQXl6aY+J2jKTIDXGuOLQ1C6hg0CY1AdKXjaslV4YETAkrpqIGbt+tSEeHPH+dL8gFh4UZe2g6JGQCyR4xRA0CtbAXY3CbSNCNypDox8cqOvwRnl0Jx5iwtuyQ4oOKfA6rV+94ZeLg=");
this.architectView.onCreate(config);
Log.d(TAG, "onCreate ...............................");
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable()) {
finish();
}
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]
{android.Manifest.permission.CAMERA}, WIKITUDE_PERMISSIONS_REQUEST_CAMERA);
}}
#Override
protected void onPostCreate (Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
architectView.onPostCreate();
try {
architectView.load("file:///android_asset/08_Browsing$Pois_5_Native$Detail$Screen/index.html"); } catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onStart() {
super.onStart();
Log.d(TAG, "onStart fired ..............");
mGoogleApiClient.connect();
}
#Override
public void onStop() {
super.onStop();
Log.d(TAG, "onStop fired ..............");
mGoogleApiClient.disconnect();
Log.d(TAG, "isConnected ...............: " + mGoogleApiClient.isConnected());
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
}
}
#Override
public void onConnected(Bundle bundle) {
Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected());
startLocationUpdates();
}
protected void startLocationUpdates() {
PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ..............: ");
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.d(TAG, "Connection failed: " + connectionResult.toString());
}
#Override
public void onLocationChanged(Location location) {
Log.d(TAG, "Firing onLocationChanged..............................................");
mCurrentLocation = location;
if (location!=null && Augmented.this.architectView != null ) {
// check if location has altitude at certain accuracy level & call right architect method (the one with altitude information)
if ( location.hasAltitude() && location.hasAccuracy() && location.getAccuracy()<7) {
Augmented.this.architectView.setLocation( location.getLatitude(), location.getLongitude(), location.getAltitude(), location.getAccuracy() );
} else {
Augmented.this.architectView.setLocation( location.getLatitude(), location.getLongitude(), location.hasAccuracy() ? location.getAccuracy() : 1000 );
}
}
}
#Override
public void onResume() {
super.onResume();
architectView.onResume();
if (mGoogleApiClient.isConnected()) {
startLocationUpdates();
Log.d(TAG, "Location update resumed .....................");
}
}
#Override
protected void onPause() {
architectView.onPause();
super.onPause();
stopLocationUpdates();
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
Log.d(TAG, "Location update stopped .......................");
}
#Override
protected void onDestroy(){
super.onDestroy();
architectView.onDestroy();
}
}

Webview Fragment : Back button and Download Listener?

I make simple webview app. using Webview fragment. App working properly. but problem is i click back button app close down. and second problem is i click on html page link. link not open in default browser. error says webpage not open. i want all tab open in same webview and back button and download link work properly. my code is
MyWebViewFragment.java
package com.example.com;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MyWebViewFragment extends Fragment {
ProgressDialog mProgress;
WebView webview;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.web_fragment, container,
false);
Bundle bundle = getArguments();
String url = bundle.getString("url");
webview = (WebView) rootView.findViewById(R.id.webview1);
WebSettings settings = webview.getSettings();
settings.setJavaScriptEnabled(true);
mProgress = ProgressDialog.show(getActivity(), "Loading",
"Please wait for a moment...");
webview.loadUrl(url);
webview.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if (mProgress.isShowing()) {
mProgress.dismiss();
}
}
});
return rootView;
}
}
MainActivity.java
package com.example.com;
import java.util.ArrayList;
import java.util.List;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
public class MainActivity extends Activity {
String[] menutitles;
TypedArray menuIcons;
String[] pageUrl;
// nav drawer title
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private List<RowItem> rowItems;
private CustomAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = mDrawerTitle = getTitle();
menutitles = getResources().getStringArray(R.array.titles);
menuIcons = getResources().obtainTypedArray(R.array.icons);
pageUrl = getResources().getStringArray(R.array.pageurl);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.slider_list);
rowItems = new ArrayList<RowItem>();
for (int i = 0; i < menutitles.length; i++) {
RowItem items = new RowItem(menutitles[i], menuIcons.getResourceId(
i, -1), pageUrl[i]);
rowItems.add(items);
}
menuIcons.recycle();
adapter = new CustomAdapter(getApplicationContext(), rowItems);
mDrawerList.setAdapter(adapter);
mDrawerList.setOnItemClickListener(new SlideitemListener());
// enabling action bar app icon and behaving it as toggle button
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.app_name,
R.string.app_name) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
updateDisplay(0);
}
}
class SlideitemListener implements ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
updateDisplay(position);
}
}
private void updateDisplay(int position) {
String url = rowItems.get(position).getPageUrl();
Fragment fragment = new MyWebViewFragment();
Bundle bundle = new Bundle();
bundle.putString("url", url);
fragment.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
setTitle(menutitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
#Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action bar actions click
switch (item.getItemId()) {
case R.id.action_settings:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/***
* Called when invalidateOptionsMenu() is triggered
*/
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
}

To open urls in webview use the code
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webView);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setPluginState(WebSettings.PluginState.OFF);
webSettings.setSupportMultipleWindows(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setAppCacheMaxSize(1);
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
webSettings.setAppCacheEnabled(false);
// webView.setVerticalScrollBarEnabled(false);
// webView.setHorizontalScrollBarEnabled(false);
webView.setWebChromeClient(new WebChromeClient());
webView.clearCache(true);
// webView.setInitialScale(100);
// webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setBackgroundColor(0);
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
Log.e("", "shouldOverrideUrlLoading load url" + url);
return false;
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
isLoaded = false;
progressDialog.setMessage("Unknown Error!");
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
try {
progressDialog.dismiss();
} catch (Exception e) {
}
}
}, 1500);
}
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
displayProgress(getString(R.string.loading), getString(R.string.loading));
Log.e("onPageStarted",url);
}
public void onPageFinished(WebView view, String url) {
isLoaded = true;
super.onPageFinished(view, url);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
try {
progressDialog.dismiss();
} catch (Exception e) {
}
}
}, 1500);
}
});
web_link = "https://twitter.com";
webView.loadUrl(web_link);
}
public void displayProgress(String title,String mes){
if (progressDialog!=null)
progressDialog.dismiss();
progressDialog = new ProgressDialog(MainActivity.this);
// progressDialog.setTitle(title);
progressDialog.setMessage(mes);
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(true);
try {
progressDialog.show();
} catch (Exception e) {
e.printStackTrace();
}
}
To go back on web view override this method to your activity
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (web_link!=null && !webView.getUrl().equals(web_link))
webView.goBack();
else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(R.string.to_exit)
.setCancelable(false)
.setPositiveButton(getString(android.R.string.yes), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
MainActivity.this.finish();
}
})
.setNegativeButton(getString(android.R.string.no), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
return super.onKeyDown(keyCode, event);
}